Open AccessA preliminary study of daytime evaporation in relation to Variations of temperature, wind speed, zero-plane Displacement and wind profile over a wheat
Author(s) -
B. Padmanabhamurty
Publication year - 1964
Publication title -
mausam
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.243
H-Index - 12
ISSN - 0252-9416
DOI - 10.54302/mausam.v15i4.5580
Subject(s) - daytime , evapotranspiration , lysimeter , wind speed , atmospheric sciences , environmental science , displacement (psychology) , plane (geometry) , amplitude , meteorology , mathematics , physics , geometry , soil science , optics , soil water , psychotherapist , psychology , ecology , biology
The paper summarises the results of wind, temperature and evapotranspiration observations taken over a wheat field at Poona. Daytime variations of zero-plane displacement, temperature and wind speed are presented. Their systematic variation during the day is also expressed mathematically. Comparison of evapotranspiration by Thornthwaite's original formula as modified by Rider and lysimetric values has been made. Better agreement could be obtained between lysimeter values and computed evapotranspiration both averaged over a ten-day period by abandoning the assumption of logarithmic variation of vapour pressure in Thornthwaite's formula and by employing the diurnal variation of zero-plane displacement.